<template>
  <div>
    <button @click="isShow = true">点我一个弹窗</button>
    <teleport to="body">
        <div class="mask" v-if="isShow">
            <div class="dialog">
                <h3>我是一个弹窗</h3>
                <p>我是一些内容</p>
                <p>我是一些内容</p>
                <button @click="isShow = false">关闭</button>
            </div> 
        </div>
    </teleport>
  </div>
</template>

<script>
import { ref } from 'vue'
export default {
  name: 'Dialog',
  setup(){
    let isShow = ref(false)
    return {isShow}
  }
}
</script>

<style>
.mask{
    position: absolute;
    top: 0;bottom: 0;left: 0;right: 0;
    background-color: rgba(0, 0, 0, 0.5);
}

.dialog{
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    background-color: brown;
    width: 300px;
    height: 300px;
}
</style>
